Survive EDoc crashes

Instead of a hard crash, display an error message indicating which app
failed.

We can't report the exact failure; only EDoc does it to stdout itself
and we can't capture it.

Pre/Post hooks are run properly despite the failure, as per escript and
compile providers.

4 files changed, 97 insertions, 0 deletions

diff --git a/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo.app.src b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo.app.src
new file mode 100644
index 0000000..9987fd5
--- /dev/null
+++ b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo.app.src
@@ -0,0 +1,17 @@
+{application, foo,
+ [{description, "An OTP application"},
+  {vsn, "0.1.0"},
+  {registered, []},
+  {mod, { foo_app, []}},
+  {applications,
+   [kernel,
+    stdlib,
+    bar1, bar2
+   ]},
+  {env,[]},
+  {modules, []},
+
+  {maintainers, []},
+  {licenses, []},
+  {links, []}
+ ]}.
diff --git a/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo.erl b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo.erl
new file mode 100644
index 0000000..52e3d0a
--- /dev/null
+++ b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo.erl
@@ -0,0 +1,19 @@
+-module(foo).

+

+-export([foo/0, bar1/0, bar2/0]).

+

+-export_type([fooer/0]).

+

+-type fooer() :: string().

+

+% @doc Foo function returns fooer.

+-spec foo() -> fooer().

+foo() -> "fooer".

+

+% @doc Bar1 function returns barer1.

+-spec bar1() -> bar1:barer1().

+bar1() -> bar1:bar1().

+

+% @doc Bar2 functions returns barer2.

+-spec bar2() -> bar2:barer2().

+bar2() -> bar2:bar2().
\ No newline at end of file
diff --git a/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo_app.erl b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo_app.erl
new file mode 100644
index 0000000..d0158d7
--- /dev/null
+++ b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo_app.erl
@@ -0,0 +1,26 @@
+%%%-------------------------------------------------------------------
+%% @doc foo public API
+%% @end
+%%%-------------------------------------------------------------------
+
+-module(foo_app).
+
+-behaviour(application).
+
+%% Application callbacks
+-export([start/2, stop/1]).
+
+%%====================================================================
+%% API
+%%====================================================================
+
+start(_StartType, _StartArgs) ->
+    foo_sup:start_link().
+
+%%--------------------------------------------------------------------
+stop(_State) ->
+    ok.
+
+%%====================================================================
+%% Internal functions
+%%====================================================================
diff --git a/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo_sup.erl b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo_sup.erl
new file mode 100644
index 0000000..67e88b4
--- /dev/null
+++ b/test/rebar_edoc_SUITE_data/bad/apps/foo/src/foo_sup.erl
@@ -0,0 +1,35 @@
+%%%-------------------------------------------------------------------
+%% @doc foo top level supervisor.
+%% @end
+%%%-------------------------------------------------------------------
+
+-module(foo_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/0]).
+
+%% Supervisor callbacks
+-export([init/1]).
+
+-define(SERVER, ?MODULE).
+
+%%====================================================================
+%% API functions
+%%====================================================================
+
+start_link() ->
+    supervisor:start_link({local, ?SERVER}, ?MODULE, []).
+
+%%====================================================================
+%% Supervisor callbacks
+%%====================================================================
+
+%% Child :: {Id,StartFunc,Restart,Shutdown,Type,Modules}
+init([]) ->
+    {ok, { {one_for_all, 0, 1}, []} }.
+
+%%====================================================================
+%% Internal functions
+%%====================================================================